jit.buffer~ crash when changing buffer~

I have a bad & reproducible crash when trying to change jit.buffer~ reference buffer~ with a "set" message.
I know that the usage such a message with this object is not documented, … but the doc says :
"feel free to use all of the friendly buffer~ messages you know and love" so I assume that it is supposed to work…

please open patch bellow to see what I mean :

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